The Stanley Intelli Tools Smart Measure Pro measures length area and volume and features a calculator function for instant adding and subtracting of measurements It has Bluetooth® connectivity to sync directly to a phone tablet or computer and to transfer files in jpeg and pdf format After attaching the Smart Measure Pro to a smart phone and connecting them via the Smart Measure Pro App the user simply takes a picture of the required surface area and the intelligent digital device automatically calculates the materials required An essential tool for urgent jobs it is designed to provide immediate calculations of specific material requirements preset within the application It is powered by an internal lithium-ion battery and is supplied with a standard USB cable for charging Free app is available for both Android & IOS Specification Accuracy ±2mm Operating Range 145m Power Built-In Lithium-Ion ;Battery